# Copyright 2018-2021 Streamlit Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import streamlit as st

container = st.container()

st.write("Line 1")
container.write("Line 2")
with container:
    "Line 3"
st.write("Line 4")

# Ensure widget states persist when React nodes shift
if st.button("Step 2: Press me"):
    st.header("Pressed!")
c = st.container()
if c.checkbox("Step 1: Check me"):
    c.title("Checked!")
